foggy-Do you have any areas where the red pines are spaced out more? What grows with more sunlight to the ground?
Also a question for the experienced forestry people. After a red pine plantation is thinned, and eventually the final harvest, what is usually the next plan for the ground? More Norway pine or give the ground a rest to eliminate disease?
What has the years of pine needles done to the ground as far as nutirents and pH? Is the correction for the soil any different than for ag ground?
Just suggestion, maybe a trial, foggy. What if you limed one area and see what would grow as far as natural vegetation?